compel: Hide compel_execute_syscall() from uapi

It uses regs caller doesn't always know and is actually a
core routine under the API compel_syscall() one.
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

compel/include/infect-priv.h

@@ -72,4 +72,6 @@ extern int sigreturn_prep_regs_plain(struct rt_sigframe *sigframe,
 				     user_fpregs_struct_t *fpregs);
 extern int sigreturn_prep_fpu_frame_plain(struct rt_sigframe *sigframe,
 					  struct rt_sigframe *rsigframe);
+extern int compel_execute_syscall(struct parasite_ctl *ctl,
+		user_regs_struct_t *regs, const char *code_syscall);
 #endif

compel/include/uapi/infect.h

@@ -65,8 +65,13 @@ extern int compel_cure(struct parasite_ctl *ctl);
 extern void *compel_parasite_args_p(struct parasite_ctl *ctl);
 extern void *compel_parasite_args_s(struct parasite_ctl *ctl, int args_size);
 
-extern int compel_execute_syscall(struct parasite_ctl *ctl,
-		user_regs_struct_t *regs, const char *code_syscall);
+extern int compel_syscall(struct parasite_ctl *ctl, int nr, unsigned long *ret,
+		unsigned long arg1,
+		unsigned long arg2,
+		unsigned long arg3,
+		unsigned long arg4,
+		unsigned long arg5,
+		unsigned long arg6);
 extern int compel_run_in_thread(struct parasite_thread_ctl *tctl, unsigned int cmd);
 
 /*